github.com
https://github.com/decidim/decidim CVE-2026-45377
MEDIUM
Decidim: Private exports can be downloaded through reusable links
Record summary
CVE-2026-45377 has a selected CVSS score of 6.5 (medium).
Description
Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the normal download_your_data flow requires the requester to be logged in as the export owner, but the resulting Active Storage blob redirect URL can be replayed without authentication by anyone who obtains it. This is because Decidim::DownloadYourDataController#download_file authenticates the export owner but redirects to a signed Active Storage blob URL that is no longer bound to the owner session. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationPoC
AutomatableNo
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Jul 31, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
decidimBrowse decidim / decidim | CVE List | < 0.30.9 | affected |
| >= 0.31.0.rc1, < 0.31.5 | affected | ||
| >= 0.32.0.rc1, < 0.32.0 | affected | ||
decidim-coreBrowse RubyGems / decidim-core | GitHub Advisory | Before 0.30.9 · Fixed in 0.30.9 | affected |
| 0.31.0.rc1 to < 0.31.5 · Fixed in 0.31.5 | affected | ||
| 0.32.0.rc1 to < 0.32.0 · Fixed in 0.32.0 | affected |
References
3github.com
https://github.com/decidim/decidim/pull/16680 github.comConfirmation
https://github.com/decidim/decidim/security/advisories/GHSA-767h-63j4-5226